The body of the crab is symmetrical from side to side and can be distinguished into frontal region, eye region, heart region, liver region, stomach region, intestine region and gill region. The crab has appendages (appendages) attached to both sides of the body. The appendages on the head, called tentacles, have tactile and olfactory functions, and some appendages have a mouth function, which is used to tear food and deliver it into the mouth.

The crab has five pairs of appendages in the thorax, called thoracic legs. The remaining four pairs of appendages are the crab's feet, on which it relies to walk and move. They walk in a unique and interesting way, mostly sideways rather than straight ahead.

The exception is the monk crab, which walks straight. Based on the fact that the two footsteps at the end of the crab's tail are less involved in walking, a 6-legged lateral movement walking mechanism has been developed by imitating the crab's walking style, and its motion characteristics have been investigated to satisfy the requirements for traveling on both rigid surfaces and soft surfaces involved in agricultural production.

Expanded Information

Eating Contraindications

Research has found that the infection rate and degree of infection of larval cysts of Schistosoma pulmonarum - the high-footed crab worm - in the body of live crabs is high, and the Schistosoma pulmonarum parasitizes the lungs, irritates or destroys lung tissues, and can cause coughing or even hemoptysis, and, if the brain is invaded, it will cause paralysis. According to experts, the crab is slightly heated and eaten, schistosoma infection rate of 20%, eat pickled crab and drunken crab, schistosoma infection rate of up to 55%, and eat raw crab, schistosoma infection rate of up to 71%.

Schistosoma lungis cysts are very resistant and are usually killed by soaking them in water at 55 degrees Celsius for 30 minutes or pickling them in 20 percent salt water for 48 hours. Eating crabs raw may also be infected by Vibrio parahaemolyticus, which invades the human body in large quantities and causes infectious poisoning, showing symptoms such as inflammation, edema and congestion of the intestinal tract.

Pregnant women can't eat crabs, and they shouldn't eat crabs during the whole pregnancy. Crab meat flavorful, nutritious, contains a lot of protein and fat, more calcium, phosphorus, iron, vitamins and other substances. Every 500 grams of crab contains 49.6 grams of protein, 9.3 grams of fat, 27.2 grams of sugar, 1.088 milligrams of phosphorus, 33.6 milligrams of iron, and an appropriate amount of vitamin A. It is both a tonic and a good food. It is both a tonic and a delicacy, very popular, often the main dish of the wedding feast. However, it is not suitable for pregnant women.

Familiar crabs

1, Gucheng Lake hairy crab

This crab is produced in the Gaochun District of Nanjing City, Gucheng Lake, traditionally known as the crown of the crab, the Gucheng Lake waters of the 100-mile radius, blue ripples, lush grass, extends the wide, where the growth of the crabs, the morphology and the quality of the meat in the crab family is particularly distinctive, and the flesh of its meat is fat and tender, tasty and rich in nutrients. Every 100 grams of meat in the Goodyear Lake crab contains 14 grams of protein, 13 milligrams of iron, 0.71 milligrams of riboflavin, and vitamin A5960 international units. In the early years of the Republic of China, one of the four famous doctors in Beijing Shi Jinmo had compared the Gucheng Lake crabs for crabs in the first a one of the world's top scholar.

2, Yangcheng Lake hairy crabs

This crab is produced in Yangcheng Lake, Suzhou, Jiangsu Province, is known at home and abroad, China's famous products, but also China's first aquatic Chinese well-known trademarks. Yangcheng Lake hairy crabs have always been known as the crown of the crab, Yangcheng Lake rippling blue waves, water quality pure as a mirror, deep water bottom hard, lush grass, extend wide, pleasant climate, is the crab settlement growth of the most ideal "Crystal Palace". The hairy crabs produced on Lotus Island of Yangcheng Lake are authentic Chinese mitten crabs from the Yangtze River area. Due to the excellent ecology of the waters, the crabs produced in Yangcheng Lake are characterized by brittle crustaceans, plump limb muscles and large individuals.

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